ChemInform Abstract: Synthesis of 3‐Fluoro‐2‐hetarylindoles and 3,3‐Difluoro‐2‐hetarylindolines Through Lewis Acid‐Catalyzed Formation of 3,3‐Difluoroindolium Ions.
Abstract:The synthesis of various 3‐fluoro‐2‐hetarylindoles through addition of indoles, pyrroles, or alkyl‐substituted furans to 3,3‐difluoroindolium ions generated in situ by zinc triflate‐catalyzed oxazolidine ring opening is described.
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